<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
		<script>
			// 循环语句
			// 1. while
			var i=0
			while(i<5)
			{
				document.write("<h3>Hello world</h3>")
				i++
			}
			
			// 2. do-while
			var j=0
			do{
				document.write("<h3 style='color:red'>Javascript</h3>")
				j++
			}while(j<5)
			
			// 3. for语句
			for(var k=0;k<5;k++)
			{
				document.write("<h3 style='color:green'>for语句</h3>")
			}
		</script>
		<h1>乘法口诀表</h1>
		<script>
			document.write("<pre>");
			for(var i=1;i<=9;i++)
			{
				for(var j=1;j<=i;j++)
				{
					document.write(j+"*"+i+"="+(i*j)+"\t");
				}
				document.write("\n");
			}
			document.write("</pre>");
			
		</script>
	</body>
</html>